Pump.



2 SHEETS-SHEET -l.

CW. ENOS d: J. M. WEST.

PUMP. A APPLICATION PILEDMAYB,l 1905. 910,802, Patented Jan. 2,6, 1'909.

lulu/lli SMU @wg @WM MM C. W. ENOS n J. M. WEST. PUMP. APPLICATION HL'EDMus, 1905.

Patented Jan. 26, 1909.

2 SHEETS-SHEET 2.

7M? 'MZ' 75mg@ UNITED STATES PATENT FFTCE.

OHARLES W. ENOS, OE EOSTON, AND JAMES M. WEST, or PEABODY,MASSACHUSETTS, ASSIGNORS To oLrMAx LUBEIOATOE COMPANY, or BOSTON,MAssAoHUSETTs, A con- PORATION OF MASSACHUSETTS.

PUMP.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application led May 3, 1905. Serial No. 258,702.

To all 'whom 'it may concern:

Be it known that we, CHARLES W. ENOS and JAMES M. lEsT, citizens of theUnited States, residing, respectively, at Boston, in

the county of Suifolk, and Peabody, in the county of Essex, both .in theState of Massachusetts, have invented new and useful Improvements inPumps, of which the following is a speciiication.

This invention relates to pumps and particularly to that class of pumpsadapted to serve as oil pump lubricators for steam engines for thepurpose of supplying oil to the interior of steam engine cylinders.

The obj ect of the invention is to provide a Simple, inexpensive andeHicient device for the purpose hereinbefore set forth, which can beeasily and conveniently attached to some moving part of an engine, andoperated by Said moving part in such a manner as to pump a smallquantity of oil into the cylinder of the engine at each stroke of thepiston.

It is the object of this invention further to provide a device which maybe quickly and conveniently adjusted to vary the amount of oil pumpedinto the cylinder at each stroke of the piston.

The invention consists of a pump comprising in its construction aplunger, which is adapted to force oil from a receptacle into a pipeleading to any desired point, and mechanism for imparting a differentialreciprocatory motion to said plunger that is, said plunger is movedslowly in one direction in order to allow the oil plenty of time to passfrom the oil receptacle to the chamber in which the plunger isreciprocated, and then upon its return stroke is moved quickly, forcingthe oil from said chamber into the pipe connecting with the enginecylinder.

The invention fiuther consists in the mechanism by which thisreciprocatory motion is imparted to said plunger, all as hereinafterfully described and particularly pointed out in the claims.

Referring to the drawings: Figure 1 is a front elevation of our improvedoil pump. Fig. 2 is a section, partly in elevation, taken on line 2 2 ofFig. 1. Fig. 3 is a front elevation, similar to Fig. 1, illustrating thecrank, crank-pin, and plunger arm in dierent positions. Fig. 4 is asection, partly i'n elevation, taken on line 4 4 of Fig. 3, the samebein partly broken away to save space in the drawings. Fig. 5 is aSection taken on ine 5 5 of Fig. 4, looking in the direction of thearrow in said figure.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 10 is the base of the pump, to which is fastened an oilreceptacle 11 provided with a top 12 and with a conical shaped straineror sieve 13 into which the oil is poured when iilling the receptacle.The base 10 is provided with an oil passage 14 which opens out of thebottom of the receptacle 11, passing downwardly therefrom, Fig. 2, thenin a horizontal direction, and thence upwardly to connect with an outletpipe 15, which, by suitable connections, is connected to the cylinder ofa Steam engine.

Two ball check valves 16 and 17 are inserted in the vertical portion ofthe oil passage 14 at the right of Fig. 2, and intermediate said checkvalves is provided a chamber 18 extending transversely of the verticalportion of the oil passage 14, and in this chamber is provided areciprocatory plunger 19, to which a reciprocatory motion is imparted ashereinafter described, said plunger sliding in a suitable stuffing-box2() which prevents the oil from leaking out of the chamber 18. A holder21 is fastened to the plunger 19 and forms, in function and eFiect, asingle piece therewith. Said holder is provided upon its periphery withhelical convolutions or screwthreads 22 which engage a screw-threadedsleeve or nut 23 fast to the base 10.

A rocker-arm 24 is fastened to the holder 21, said arm being providedwith a Slot 25 extending longitudinally thereof, and into said Slotprojects a crank-pin 26 fast to a crank 27. The crank 27 is fast to astud 28 by means of a nut 29 (Fig. 4). Said stud 28 projects through aratchet 30 and is provided upon the rear side of said ratchet with ahead 31. Immediately adjacent to the head 31 is a washer 32 andextending from said washer 32 to the back face of the crank 27 is abushing 33, the construction being such that when the nut 29 is screwedu on the stud 28, the head of said stud will c amp the washer 32 andbushing 33 iirmly against each other, and the bushing 33 will be clampedagainst the rear face of the crank 27, so that said crank 27, stud 28,washer 32 and bushing 33 will form, in eiect, a single piece rotatable uon the ratchet 30 and eccentric thereto. t is evident that if desiredthe stud 28 might be rigidly fastened to the ratchet 30 and the crank 27rotatable thereon without departing from the spirit or our invention. Itwill be seen and understood that the ratchet 30 acts as a carrier forthe stud 23, the crank-arm 27 and the crank-pin 26.

A pin 34 is slidably mounted upon the rear face of the crank 27 and isheld by a spring 35 in engagement with recesses or ratchet teeth 36extending partly around the periphery of a disk 37 fastened by rivets 38to the ratchet 30. A friction roll 39 is rotatably mounted upon thecrank -pin, the periphery of said roll adapted to bear against theopposite sides of the slot 25.

The ratchet 30 is rotatably mounted upon astud 40 fast to the side wallof the oil receptacle 11 and an intermittent motion is imparted theretoby a pawl 41 pivoted to a pawl-lever 42, pivoted to rock upon the stud40, a rocking motion being imparted to the said pawl lever by an arm 43fast thereto and connected by suitable connections, such as a link, tosome movable portion of the engine.

A stop pawl 44 pivoted at 45 to 'the base 10 engages the ratchet 30 andprevents the same from moving backwardly or in the opposite direction tothat imparted to it by the pawl 41. A gage 46 oi well known constructionis connected to the cil receptacle 11 for the purpose of indicating theamount of oil contained in said receptacle.

The general operation ci the iorin oi our invention hereinbe'forespecifically described, is as follows Assuming a rocking motion to beimparted to the arm 43 by a link or other suitable connection which isconnected to a moving portion oi the engine, to the cylinder of whichoil is to be supplied, it will be seen that the pawl 41 will impart anintermitte t rotary motion to the ratchet 36 and as said ratchet is thusrotated, the crank-pin 26, which, in the operation of the device, islocked to the ratchet 30, will rock the arm 34 alternately in oppositedirections and thus impart a rocking movement to the holder 21 and alsoto the plunger 19. As the nut 23 is stationary, it is evident that therocking motion hereinbeiore referred t0V imparted to the holder 21 willcause the same to move longitudinally thereof, and the plunger 19 willthus be reciprocated in the chamber 13 with the lrollowing result: Asthe plunger 19 moves toward the left, oil will enter the chamber 13,passing through the passage 14 from the receptacle 11 and through thelower check valve 16. Upon its return movement toward the right, the oilwhich has passed into the chamber 18 will be forced through the uppercheck valve 17, the lower check valve 16 closing during this portion oithe movement oi the plunger, and the oil will thus be forced from thechamber 18 into the outlet pipe 15, and by said outlet pipe conveyed tothe interior of the cylinder of the engine. By reference to Figs. 1 and3, it will be seen that the crank-pin 26 may be placed, as

in Fig. 1, near the center of the ratchet 30, or it may be placed quitea distance therefrom, as shown in Fig. 3, where said crank-pin isYlocated outside the periphery of said ratchet. rl`his adjustment of theposition of the crank-pin 26 to different distances from the axial lineof the ratchet 30 is accomplished by rotating the crank 27 in thedirection of the arrow ct (Fig. 3), the pin 34 slipping over thediiierent ratchet teeth 36 to allow of this rotation, it beingunderstood that the ratchet disk 39 is iixed to the ratchet 30.' Duringthe rotation oi the ratchet 30 any tendency of the crank 27 to rotateupon said ratchet, together with the stud 28, iscounteracted by thelocking pin 34 and the ratchet disk 37\` with which said locking pin isin engagement, so that the distance between the centers oi the crank-pin26 and the stud 40 may be very pawl 41 and pawl lever 42 in thedirection of the arrow l) (Fig. 3) and the crank-pin 26 moveslongitudinally ci the arm 24 in the slot 25. It is evident that thegreater the distance of the crank-pin 26 from the center ci the stud 49,the greater will be the angle through which the arm 24 is rocked, andconsequently the Greater the distance that the holder 21 will be rockedand the greater the longitudinal movement imparted by said rockingholder to the plunger 19, so that by increasing the distance of thecrank-pin 26 from the center of the stud 40 or from the center oftheratchet 30, the plunger"19 will be reciprocated to a greater extent andmore oil will be pumped and vice versa. lt will also be noted that asthe crank-pin 26 is rotated, as hereinbeiore described, the same slidinglongitudinally in the slot 25 during the rocking movement of the arm 24;when said crankpin is near the bottom oi the slot 25 the angularvelocity of the rocking movement oi the arm 24 will be much greater fora given angle oi rotation oi the crank-pin of the ratchet 30 than wouldbe the case when said crank-pin is near the outer end of the slot 25, sothat as said crank-pin 26 moves through one portion oi a rotation therocking movement of the arm 24 will be much quicker than when saidcrank-pin is passing through the remainder of its rotation and thus alongitudinal difierential movement of the plunger 19 is obtained, saidplunger being moved backward or toward the left (Fig. 2) slowly, thusallowing time for the oil to pass into the chamber 18, as hereinbeioredescribed, and forward or toward the right (Fig. 2) quickly when the oilis being forced through the valve 17 and into the outlet pipe 15. Thisdifferential movement is of great advantage in a device of the characterdescribed, especially when the same is attached to a uick runningengine, for the reason that it a loWs time enough for the oil to bedrawn into the plunger chamber, and a continual supply of oil is thussupplied to the cylinder of the engine by the quick return stroke ofsaid plunger.

Having thus described our invention, What We claim and desire by LettersPatent to secure is:

l. In a device of the character described, a plunger provided with ascrew-thread, a nut engaging said screw-thread, one of said partsstationary, and means to iinpart a differential rocking movement to theother of said parts.

2.. In a device of the character described, a plunger provided with ascrew-thread, a stationary nut engaging said screw-thread, a rocker armconnected to said plunger, and a rotary crank-pin connected to said armand slidable thereon toward and away from the axis of said plunger.

3. In a device of the character described, a plunger provided with ascrew-thread, a stationary nut engaging said screw-thread, a rocker armconnected to said plunger, and a rotary crank-pin connected to said armand slidable thereon toward and aWay from the axis of said plunger, andmeans to adjust said crank-pin relatively to its aXis of rotation.

4. In a device of the character described, a plunger provided with ascrew-thread, a stationary nut engaging said screw-thread, a rocker armconnected to said plunger, a rotary ratchet, and a crank-pin fastthereto and projecting into a slot provided in said rocker arm.

5. In a pump, a plunger provided With a screw-thread, a stationary nutengaging said screw-thread, a rocker arm connected to said plunger, arotary ratchet and a crank-pin fast to said ratchet, adjustable towardand away from the center of said ratchet, said crank-pin projecting intoa slot provided in said arm.

6. In a device of the character described, a rotary ratchet, a studeccentrically mounted thereon, a disk provided With recesses in itsperiphery fast to said ratchet concentric With said stud, a crankmounted on said stud, a spring pin mounted on said crank adapted toproject into said recesses, and a crank-pin fast to said crank.

7. In a device ofthe character described, a rotary ratchet, a studeccentrically mounted thereon, a disk provided With recesses in itsperiphery fast to said ratchet concentric With said stud, a crankmounted on said stud, a spring pin mounted on said crank adapted toproject into said recesses, a crank-pin Jfast to said crank, a pavvllever, and a pavvl pivoted to said paWl lever adapted to engage theteeth of said ratchet.

8. In a device ofthe character described, a plunger provided With ascrew-thread, a stationary nut engaging said screw-thread, a rocker armfast to said plunger, a rotary carrier, a crank rotatably andeccentrically mounted thereon, a crank-pin fast to said crank andprojecting into a slot provided in said rocker arm, and means to locksaid crank to said carrier.

In testimony whereof We have hereunto set our hands in presence of tWosubscribing Witnesses.

' CHARLES W. ENCS.

JAMES M. WEST. Witnesses to the signature of Charles IIJ. Enos:

JOHN W. CONVERSE, WILLIAM C. GLAss. Witnesses to the signature ofJamesM. West:

CHARLES S. GooDING, ANNIE J. DAILEY.

